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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All Rights Reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "AccessibilityMenuListPopup.h"
     28 
     29 #include "AXObjectCache.h"
     30 #include "AccessibilityMenuList.h"
     31 #include "AccessibilityMenuListOption.h"
     32 #include "HTMLNames.h"
     33 #include "HTMLSelectElement.h"
     34 #include "RenderObject.h"
     35 
     36 namespace WebCore {
     37 
     38 using namespace HTMLNames;
     39 
     40 AccessibilityMenuListPopup::AccessibilityMenuListPopup()
     41     : m_menuList(0)
     42 {
     43 }
     44 
     45 bool AccessibilityMenuListPopup::isVisible() const
     46 {
     47     return false;
     48 }
     49 
     50 bool AccessibilityMenuListPopup::isOffScreen() const
     51 {
     52     return m_menuList->isCollapsed();
     53 }
     54 
     55 AccessibilityObject* AccessibilityMenuListPopup::parentObject() const
     56 {
     57     return m_menuList;
     58 }
     59 
     60 bool AccessibilityMenuListPopup::isEnabled() const
     61 {
     62     return m_menuList->isEnabled();
     63 }
     64 
     65 AccessibilityMenuListOption* AccessibilityMenuListPopup::menuListOptionAccessibilityObject(HTMLElement* element) const
     66 {
     67     if (!element || !element->hasTagName(optionTag))
     68         return 0;
     69 
     70     AccessibilityObject* object = m_menuList->renderer()->document()->axObjectCache()->getOrCreate(MenuListOptionRole);
     71     ASSERT(object->isMenuListOption());
     72 
     73     AccessibilityMenuListOption* option = static_cast<AccessibilityMenuListOption*>(object);
     74     option->setElement(element);
     75 
     76     return option;
     77 }
     78 
     79 bool AccessibilityMenuListPopup::press() const
     80 {
     81     m_menuList->press();
     82     return true;
     83 }
     84 
     85 void AccessibilityMenuListPopup::addChildren()
     86 {
     87     Node* selectNode = m_menuList->renderer()->node();
     88     if (!selectNode)
     89         return;
     90 
     91     m_haveChildren = true;
     92 
     93     ASSERT(selectNode->hasTagName(selectTag));
     94 
     95     const Vector<Element*>& listItems = static_cast<HTMLSelectElement*>(selectNode)->listItems();
     96     unsigned length = listItems.size();
     97     for (unsigned i = 0; i < length; i++) {
     98         // The cast to HTMLElement below is safe because the only other possible listItem type
     99         // would be a WMLElement, but WML builds don't use accessbility features at all.
    100         AccessibilityMenuListOption* option = menuListOptionAccessibilityObject(static_cast<HTMLElement*>(listItems[i]));
    101         if (option) {
    102             option->setParent(this);
    103             m_children.append(option);
    104         }
    105     }
    106 }
    107 
    108 void AccessibilityMenuListPopup::childrenChanged()
    109 {
    110     for (size_t i = m_children.size(); i > 0 ; --i) {
    111         AccessibilityObject* child = m_children[i - 1].get();
    112         if (child->actionElement() && !child->actionElement()->attached()) {
    113             m_menuList->renderer()->document()->axObjectCache()->remove(child->axObjectID());
    114             m_children.remove(i - 1);
    115         }
    116     }
    117 }
    118 
    119 void AccessibilityMenuListPopup::setMenuList(AccessibilityMenuList* menuList)
    120 {
    121     ASSERT_ARG(menuList, menuList);
    122     ASSERT(!m_menuList);
    123     m_menuList = menuList;
    124 }
    125 
    126 } // namespace WebCore
    127